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An action potential arrives at the synapse, triggering Ca2+ channels to open. This in turn triggers vesicles holding neurotransmitter to fuse with the presynaptic membrane, releasing the neurotransmitter ...

There are two main muscle filaments in muscle fibres: Actin and myosin filaments. Actin filaments are thin and have binding sites for the globular heads ...

Sex linkage refers to when certain alleles affect one gender more than the other. Men tend to be affected by some genetic disorders more than women. This is because some alleles for genetic disorders are ...

Enzyme activity is dependent on five different factors. These include temperature, pH, concentration of substrate, concentration of inhibitor and concentration of the enzyme itself. Firstly, most enzymes ...

An enzyme is a biological catalyst that enables reactions to occur by decreasing the activation energy they need. Not only would certain reactions not take place without the enzyme, they are also importan...